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Book of Abstracts First Legume Society Conference 2013: A Legume Odyssey Novi Sad, Serbia, 9-11 May 2013
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Competition between spring cereals and faba bean in mixed cropping
Ewa Szpunar-Krok, Dorota Bobrecka-Jamro, Jan Buczek, Renata Tobiasz-Salach
University of Rzeszów, The Chair of Crop Production, Poland
The field experiment was established in Krasne, near Rzeszów (50 o 03’N, 22 o 06’E), South-east
Poland on good wheat soil complex. The aim of the research was to assess competitive
interactions between spring cereals (barley, oat, naked oat, wheat, triticale) and faba bean varieties
of varying growth type (undetermined and determined varieties). The reaction of plants cultivated
in mixtures was studied using the land equivalent ratio (LER), relative crowding coefficient
(RCC), competitive ratio (CR) as well as aggressiveness (A). Faba bean mixtures with spring
cereals gave significantly higher yields in comparison with faba bean in pure sowing but did not
differ much compared to cereals in pure sowing. The exception was in faba bean mixtures with
naked oats, which gave the lowest yields while their yields were close to those obtainable in pure
sowings of both components. The highest yields were obtained from mixtures of faba bean with
hulled oats, but the grain yield of the leguminous component in the total yield of such mixtures
was the lowest. The cultivation of spring cereals and faba bean in mixtures is more effective than
in monocultures as indicated by the higher than 1 LER value. The highest value of LER was
noted in mixtures of faba bean with triticale, which thus confirms the mutually positive impacts
of both species. A higher efficiency of use of environmental resources was demonstrated by
cereals. Hulled oats turned out the most dominating in mixtures with both varieties of faba bean.
The most favourable conditions for growth and yield for the undetermined growth type variety
were in mixtures with triticale and wheat, while for the determined growth type was in mixtures
with triticale and barley. The determined growth type variety exhibited greater competitiveness
with cereals than the undetermined growth type variety.
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